Event Notification Report for October 28, 2012
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
10/27/2012 - 10/28/2012
EVENT NUMBERS
48449
Power Reactor
Event Number: 48449
Facility: PERRY
Region: 3 State: OH
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: JIM PRY
HQ OPS Officer: DONG HWA PARK
Region: 3 State: OH
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: JIM PRY
HQ OPS Officer: DONG HWA PARK
Notification Date: 10/28/2012
Notification Time: 16:27 [ET]
Event Date: 10/28/2012
Event Time: 10:08 [EDT]
Last Update Date: 10/28/2012
Notification Time: 16:27 [ET]
Event Date: 10/28/2012
Event Time: 10:08 [EDT]
Last Update Date: 10/28/2012
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
Person (Organization):
PATTY PELKE (R3DO)
PATTY PELKE (R3DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
EQUIPMENT FAILURE AFFECTING SPDS AND ERDS
"At approximately 1008 EDT on October 28th, 2012, a failure between the Plant Computer and the MMI (Man Machine Interface) occurred. The cause is due to a failure of the data diode. The Plant Computer is still working however the MMI is not, therefore Safety Parameter Display System (SPDS) outside of the Control Room and the Emergency Response Data System (ERDS) is unavailable.
"In the event of an emergency, plant parameter data will be communicated to the facilities through the status board ring down circuit with back-up by the Private Branch Exchange (PBX), Off Premise Exchange (OPX), and various redundant intra-facility circuits throughout the emergency facilities. The dose assessment function is maintained during this out of service time period by manual input of data into the Meteorological Information and Dose Assessment System (MIDAS). The ability to open and maintain an 'open line' using the Emergency
Notification System is not affected and will be the primary means for transferring plant data to the NRC as a contingency until the ERDS can be returned to service.
"At 1548 EDT on October 28th, 2012, a re-start of the data diode was successful in restoring the connection between the Plant Computer and the MMI. SPDS and the ERDS are functioning as designed.
"This event is being reported in accordance with 10 CFR 50.72(b)(3)(xiii). The NRC Resident Inspector has been notified."
The licensee has notified the State and local agencies.
"At approximately 1008 EDT on October 28th, 2012, a failure between the Plant Computer and the MMI (Man Machine Interface) occurred. The cause is due to a failure of the data diode. The Plant Computer is still working however the MMI is not, therefore Safety Parameter Display System (SPDS) outside of the Control Room and the Emergency Response Data System (ERDS) is unavailable.
"In the event of an emergency, plant parameter data will be communicated to the facilities through the status board ring down circuit with back-up by the Private Branch Exchange (PBX), Off Premise Exchange (OPX), and various redundant intra-facility circuits throughout the emergency facilities. The dose assessment function is maintained during this out of service time period by manual input of data into the Meteorological Information and Dose Assessment System (MIDAS). The ability to open and maintain an 'open line' using the Emergency
Notification System is not affected and will be the primary means for transferring plant data to the NRC as a contingency until the ERDS can be returned to service.
"At 1548 EDT on October 28th, 2012, a re-start of the data diode was successful in restoring the connection between the Plant Computer and the MMI. SPDS and the ERDS are functioning as designed.
"This event is being reported in accordance with 10 CFR 50.72(b)(3)(xiii). The NRC Resident Inspector has been notified."
The licensee has notified the State and local agencies.